rack one's brain

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rack one's brain

Where it comes from

Combination of rack (“medieval torture method”), and brain, thus meaning “to cause the mind extreme discomfort”.

Variants include rack one's wit (1583) and rack one's memory, as well as cudgel one's brain / cudgel one's brains.

verb racks one's brain · racking one's brain · racked one's brain · rack one's brains · wrack one's brain

  1. figuratively To struggle to think of or remember something. I have been racking my brain all day trying to think of a birthday present for her.

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MLA

"rack one's brain." Wiktionary, via Micwyn, micwyn.com/word/rack%20one's%20brain. Accessed 6 Nov. 2026.

APA

rack one's brain. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/rack%20one's%20brain

Chicago

"rack one's brain." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/rack%20one's%20brain.

BibTeX
@misc{rack_one_s_brain_2026,
  title = {rack one's brain},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/rack%20one's%20brain},
  urldate = {2026-11-06}
}